Separating device for resource utilization of polyether polyol byproduct

Abstract

The utility model relates to the technical field of polyether polyol production, in particular to a separation device for resource utilization of polyether polyol byproducts, which comprises a kettle body, an upper seal head arranged at an opening at the top of the kettle body, a conical bottom end of the kettle body and a steam ingress pipe, an input end of the steam ingress pipe is connected with a steam source, and an output end of the steam ingress pipe extends into the kettle body; the input end of the discharging main pipe is connected with a discharging opening in the bottom end of the kettle body; the densimeter is arranged on the discharge header pipe; the sight glass is arranged on the discharge header pipe; the discharging branch pipes comprise the first discharging branch pipe and the second discharging branch pipe, the input end of the first discharging branch pipe and the input end of the second discharging branch pipe are both connected with the output end of the discharging main pipe, and the output end of the first discharging branch pipe and the output end of the second discharging branch pipe are connected with the first storage tank and the second storage tank respectively. The device can be used for separating an organic phase from a water phase of a polyether polyol byproduct after water dissolution and layering, is convenient to operate, and improves the production efficiency of resource utilization of the polyether polyol byproduct.

Description

Technical Field

[0001] The utility model relates to the technical field of polyether polyol production, in particular to a separation device for resource utilization of polyether polyol by-products. Background Art

[0002] Polyether salt residue, also known as polyether polyol salt residue, refers to solid waste generated during the production of polyether polyols and is a byproduct of polyether polyol production. Polyether polyols are important chemical raw materials, widely used in the synthesis of polymer materials such as polyurethane, polyurea, and polyester. During the production process, a certain amount of salt residue is generated. Analysis shows that this salt residue mainly consists of the following components by weight: 20%-60% finished polyether product, 5%-50% clay and magnesium silicate, and the balance is potassium dihydrogen phosphate and impurities. The finished polyether product has a low solubility, while clay and magnesium silicate are insoluble, and potassium dihydrogen phosphate is readily soluble.

[0003] The treatment and disposal of polyether salt residue is a major environmental issue. Direct discharge of salt residue into the environment can pollute soil and water. Therefore, appropriate disposal methods are needed to minimize environmental impact.

[0004] The prior art discloses a method for extracting effective ingredients from polyether polyol salt residue using water extraction to achieve resource utilization of polyether polyol by-products. The specific method is to extract the waste residue using water as the extractant and an extraction temperature of 80-90°C to obtain an organic phase containing polyether, an aqueous phase containing potassium dihydrogen phosphate, and a solid phase composed of insoluble matter. The organic phase containing the polyether is then filtered and dehydrated to obtain the polyether. The polyether and potassium dihydrogen phosphate in the waste residue are extracted using an extraction method, taking advantage of the fact that potassium dihydrogen phosphate is soluble in water and the polyether is essentially insoluble in water. The waste residue can be extracted using conventional methods, wherein the waste residue and water are added to an extraction container, heated, stirred evenly, and allowed to stand for stratification. The extraction container comprises, from top to bottom, an organic phase layer, an aqueous phase layer, and a solid waste residue layer: wherein the organic phase layer contains polyether, the aqueous phase layer contains potassium dihydrogen phosphate, and the solid waste residue layer contains a water-insoluble adsorbent.

[0005] In the prior art, water is used to dissolve and extract polyether salt residue, and the organic phase and the aqueous phase after dissolution are difficult to separate. Utility Model Content

[0006] In response to the technical problem that the products of polyether salt slag dissolution treatment in the existing technology are difficult to separate, the utility model provides a separation device for resource utilization of polyether polyol by-products, which realizes the separation of the organic phase and aqueous phase of the polyether polyol by-products extracted by water dissolution, has a simple structure and is easy to operate.

[0007] The utility model provides a separation device for resource utilization of polyether polyol byproducts, comprising a kettle body, an upper head being provided at the top opening of the kettle body, and a conical bottom end of the kettle body, and further comprising:

[0008] A steam inlet pipe, the input end of which is connected to the steam source, and the output end of which extends into the interior of the kettle;

[0009] The discharge main pipe, the input end of which is connected to the discharge port at the bottom of the kettle body;

[0010] Density meter, installed on the discharge main pipe;

[0011] Sight glass, installed on the discharge main pipe;

[0012] The discharge branch pipe includes a first discharge branch pipe and a second discharge branch pipe. The input ends of the first discharge branch pipe and the second discharge branch pipe are both connected to the output end of the discharge main pipe. The output ends of the first discharge branch pipe and the second discharge branch pipe are respectively connected to the first storage tank and the second storage tank.

[0013] Furthermore, a main valve is provided on the main discharge pipe, a first valve is provided on the first discharge branch pipe, and a second valve is provided on the second discharge branch pipe.

[0014] Furthermore, the output end of the steam introduction pipe is connected to an immersion type steam-water mixer. The immersion type steam-water mixer is preferably an HJ type immersion type steam-water mixer, which is used to directly introduce steam into the mixture of the polyether polyol byproduct and water to directly heat the materials in the kettle.

[0015] Furthermore, the density meter is a differential pressure online density meter, which is used to continuously measure the density of liquids online, facilitating real-time monitoring of the density of materials in pipelines.

[0016] Furthermore, the interior of the kettle is equipped with a conical bucket with openings at both ends. The lower end of the bucket is welded to the discharge port, and a flexible fabric is connected between the upper edge of the bucket and the inner wall of the kettle. A vibrator is fixed to the outer surface of the conical bucket, and the angle of the conical bucket is ≤60°. The purpose is to dissolve and extract materials containing 5% to 50% of a small amount of solid adsorbent (such as clay and magnesium silicate). After stratification, the solid adsorbent deposited on the inner wall of the conical bucket is vibrated down by the vibration of the vibrator and discharged through the discharge port, ensuring complete discharge.

[0017] Furthermore, the flexible cloth is a silicone cloth, one end of which is bonded to the inner wall of the kettle body and the other end is bonded to the conical bucket. The silicone cloth is resistant to acid and alkali, wear, high and low temperatures, and corrosion, and seals the upper opening of the conical bucket with the inner wall of the kettle body, forming a closed cavity that can accommodate the exciter.

[0018] The beneficial effect of the utility model is that the utility model can separate the organic phase and the aqueous phase of the polyether polyol byproduct after water dissolution and stratification, the operation is convenient, and the production efficiency of resource utilization of the polyether polyol byproduct is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a structural diagram of Example 1 of the specific implementation method of the present utility model.

[0021] Figure 2 This is a schematic diagram of the partial structure of Example 2 of the specific implementation method of the present utility model.

[0022] In the figure, 1-steam inlet pipe, 2-immersed soda-water mixer, 3-kettle body, 4-main valve, 5-discharge main pipe, 6-densitometer, 7-sight glass, 8-first valve, 9-first discharge branch pipe, 10-second valve, 11-second discharge branch pipe, 12-first storage tank, 13-second storage tank, 14-flexible cloth, 15-vibrator, 16-discharge port, 17-conical bucket. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figure 1 The utility model provides a separation device for resource utilization of polyether polyol byproducts, including a kettle body 3, which is a pressure-resistant container. The top opening of the kettle body 3 is provided with an upper head. The bottom end of the kettle body 3 is conical with a cone angle of 45 to 70 degrees, so that the solid powder in the polyether polyol byproduct can flow out without accumulation. The kettle body 3 is equipped with a stirrer with an adjustable speed of 0 to 100 r / min. The utility model also includes:

[0026] A steam inlet pipe 1 has its input end connected to a steam source and its output end extending into the interior of the kettle 3. The output end of the steam inlet pipe 1 is connected to an immersion-type soda-water mixer 2, which is an HJ-type immersion-type soda-water mixer. Steam can be introduced directly into the kettle 3. The HJ-type immersion-type soda-water mixer 2 preferably has the advantages of low vibration and low noise. It is used to directly introduce steam into the mixture of the polyether polyol byproduct and water, thereby directly heating the materials in the kettle 3.

[0027] The discharge main pipe 5 has an input end connected to a discharge port 16 at the bottom end of the kettle body 3 for discharging the material in the kettle body 3 .

[0028] The density meter 6 is provided on the discharge main pipe 5 and is a differential pressure online density meter used for continuous online measurement of liquid density, facilitating real-time monitoring of the density of the material in the pipeline.

[0029] The sight glass 7 is provided on the discharge main pipe 5 and is used to observe the stratification of the materials in the pipe.

[0030] The discharge branch pipes include a first discharge branch pipe 9 and a second discharge branch pipe 11. The input ends of the first discharge branch pipe 9 and the second discharge branch pipe 11 are both connected to the output end of the discharge main pipe 5, and the output ends of the first discharge branch pipe 9 and the second discharge branch pipe 11 are respectively connected to the first storage tank 12 and the second storage tank 13. The main valve 4 is provided on the discharge main pipe 5, the first discharge branch pipe 9 is provided with a first valve 8, and the second discharge branch pipe 11 is provided with a second valve 10.

[0031] The method of using the utility model is as follows:

[0032] Add the polyether polyol by-product and water into the kettle 3, start stirring at a high speed of 30-80 r / min, introduce steam through the HJ type immersion soda mixer 2, heat to a certain temperature, then reduce the stirring speed to 2-10 r / min, stir for 3-10 minutes, let it stand for stratification, open the main valve 4 at the bottom of the kettle 3, and the mixture of brine (potassium dihydrogen phosphate) and solid powder (adsorbent) enters the pipeline with the density meter 6 and sight glass 7. Open the first valve 8 and put the brine mixture into the first storage tank 12. During this period, the density displayed by the density meter 6 is 1.08-1.3 g / cm 3 When the density meter 6 detects that the density has dropped significantly to 0.95~1.05g / cm 3 When polyether and brine are visible in the sight glass 7, with polyether in the upper layer and brine mixture in the lower layer, the first valve 8 is immediately closed, the second valve 10 is opened, and the polyether is placed in the second storage tank 13. The separation of the organic phase and the aqueous phase is achieved.

[0033] Example 2

[0034] like Figure 2The difference between Example 2 and Example 1 is that a conical bucket 17 with upper and lower openings is provided inside the kettle body 3. The lower end of the conical bucket 17 is welded to the discharge port 16. A flexible cloth 14 is connected between the upper edge of the conical bucket 17 and the inner wall of the kettle body 3. An exciter 15 is fixed to the outer surface of the conical bucket 17. The flexible cloth 14 is a silicone cloth, one end of which is bonded to the inner wall of the kettle body 3 and the other end is bonded to the conical bucket 17. The cone angle of the conical bucket is ≤60°. The purpose is that the material after dissolution and extraction contains a small amount of solid adsorbent (such as clay, magnesium silicate, etc.) of 5% to 50%. After stratification, it will be deposited at the bottom of the kettle body 3 and difficult to discharge. The solid adsorbent deposited on the inner wall of the conical bucket 17 is vibrated down by the vibration of the exciter 15 and discharged through the discharge port 16, and the discharge is complete.

[0035] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall fall within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A separation device for resource utilization of polyether polyol byproducts, comprising a kettle, an upper head is provided at the top opening of the kettle, and the bottom end of the kettle is tapered, characterized in that: Also includes: A steam inlet pipe, the input end of which is connected to a steam source, and the output end of which extends into the interior of the kettle; The discharge main pipe, the input end of which is connected to the discharge port at the bottom of the kettle body; Density meter, installed on the discharge main pipe; Sight glass, installed on the discharge main pipe; The discharge branch pipe includes a first discharge branch pipe and a second discharge branch pipe. The input ends of the first discharge branch pipe and the second discharge branch pipe are both connected to the output end of the discharge main pipe. The output ends of the first discharge branch pipe and the second discharge branch pipe are respectively connected to the first storage tank and the second storage tank.

2. A separation device for resource utilization of polyether polyol byproducts according to claim 1, characterized in that: A main valve is provided on the main discharge pipe, a first valve is provided on the first discharge branch pipe, and a second valve is provided on the second discharge branch pipe.

3. The separation device for resource utilization of polyether polyol byproducts according to claim 1, characterized in that: The output end of the steam inlet pipe is connected to an immersed steam-water mixer.

4. The separation device for resource utilization of polyether polyol byproducts according to claim 1, characterized in that: The density meter is a differential pressure online density meter.

5. The separation device for resource utilization of polyether polyol byproducts according to claim 1, characterized in that: A conical bucket with openings at both ends is provided inside the kettle body. The lower end of the conical bucket is welded to the discharge port. A flexible cloth is connected between the upper edge of the conical bucket and the inner wall of the kettle body. An exciter is fixed on the outer surface of the conical bucket. The cone angle of the conical bucket is ≤60°.

6. A separation device for resource utilization of polyether polyol byproducts according to claim 5, characterized in that: The flexible cloth is a silicone cloth, one end of which is bonded to the inner wall of the kettle body, and the other end is bonded to the conical bucket.

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